CN107973356B - Boiler blowdown heat energy cyclic utilization system - Google Patents
Boiler blowdown heat energy cyclic utilization system Download PDFInfo
- Publication number
- CN107973356B CN107973356B CN201710992666.3A CN201710992666A CN107973356B CN 107973356 B CN107973356 B CN 107973356B CN 201710992666 A CN201710992666 A CN 201710992666A CN 107973356 B CN107973356 B CN 107973356B
- Authority
- CN
- China
- Prior art keywords
- pipeline
- sewage
- water
- softened water
- tank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/06—Flash evaporation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/48—Devices for removing water, salt, or sludge from boilers; Arrangements of cleaning apparatus in boilers; Combinations thereof with boilers
- F22B37/54—De-sludging or blow-down devices
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/02—Temperature
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/42—Liquid level
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/10—Energy recovery
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention provides a boiler blow-off heat energy recycling system, and belongs to the technical field of boiler blow-off heat energy utilization. The utility model provides a boiler blowdown heat energy cyclic utilization system, includes soft water station, the boiler, with the oxygen-eliminating device that the boiler is linked together, its characterized in that still includes: the softened water circulating device is communicated with the soft water station, and the softened water generated by the soft water station flows into the softened water circulating device, then flows through the deaerator and is conveyed to the boiler; the buffer tank is communicated with the bottom of the boiler; the sewage circulating device is respectively communicated with the boiler and the buffer tank; and the heat exchanger is respectively connected with the softened water circulating device and the sewage circulating device, the softened water and the sewage respectively flow through the heat exchanger, and the sewage transfers heat to the softened water. The invention makes softened water and sewage generated by boiler blow-off respectively circulate and uninterruptedly flow through the heat exchanger, and fully utilizes the heat energy of the sewage to preheat the softened water.
Description
Technical Field
The invention belongs to the technical field of boiler blow-off heat energy utilization, and particularly relates to a boiler blow-off heat energy recycling system.
Background
Boiler blow-down includes boiler surface blow-down and boiler bottom blow-down. The boiler surface pollution discharge is related to the alkalinity, the conductivity and the like of boiler water, the boiler has special requirements on the alkalinity and the conductivity of the boiler water, when the alkalinity or the conductivity of the boiler water is not up to the standard, the unqualified boiler water needs to be discharged, and the discharge amount of the boiler water is related to the alkalinity or the conductivity of the boiler water, so the discharge amount of the boiler water has fluctuation, the heat energy of the boiler surface pollution discharge is generally simply utilized, and the heat energy utilization has intermittence and incompleteness, thereby causing the waste of the heat energy.
Boiler bottom blowdown is mainly that the impurity and the sewage etc. of sediment in the boiler bottom of discharging, and boiler bottom blowdown has transient nature and intermittent type nature, consequently, produces vibration and impact easily during boiler bottom blowdown, and the general direct outer row of sewage of boiler bottom exhaust does not have recycle, has caused the waste of heat energy equally.
Boiler water is the demineralized water, and the demineralized water that the demineralized water station produced is transported to the boiler and is used, generally adopts the heat energy of above-mentioned boiler surface blowdown to carry out simple preheating to the demineralized water, and soft water after preheating flows into the boiler again and is used, because the fluctuation of boiler load, makes the demineralized water stream that gets into the boiler have intermittent type nature, consequently, the demineralized water also has intermittent type nature to the utilization of the heat energy of above-mentioned boiler surface blowdown, makes the heat energy utilize not thoroughly, causes the waste of heat energy.
Disclosure of Invention
The invention aims to provide a boiler blow-down heat energy recycling system, which enables softened water and sewage generated by boiler blow-down to respectively circulate and uninterruptedly flow through a heat exchanger, fully utilizes the heat energy of the sewage and preheats the softened water.
The invention adopts the following technical scheme: the utility model provides a boiler blowdown heat energy cyclic utilization system, includes soft water station, the boiler, with the oxygen-eliminating device that the boiler is linked together, its characterized in that still includes: the softened water circulating device is communicated with the soft water station, and the softened water generated by the soft water station flows into the softened water circulating device, then flows through the deaerator and is conveyed to the boiler;
the buffer tank is communicated with the bottom of the boiler; the sewage circulating device is respectively communicated with the boiler and the buffer tank; and the heat exchanger is respectively connected with the softened water circulating device and the sewage circulating device, the softened water and the sewage respectively flow through the heat exchanger, and the sewage transfers heat to the softened water.
The softened water circulating device comprises a softened water tank and a softened water circulating pipeline which is positioned outside the softened water tank and communicated with the softened water tank, wherein a first electric valve, a first water pump and a second electric valve are sequentially arranged on the softened water circulating pipeline in the flowing direction of softened water, the softened water circulating pipeline is communicated with the heat exchanger, the heat exchanger is positioned between the first water pump and the second electric valve, and the downstream end part of the softened water circulating pipeline is communicated with the top of the softened water tank.
A first pipeline communicated with the deaerator is arranged on the softened water circulating pipeline at the upstream of the second electric valve, and a third electric valve is arranged on the first pipeline;
the lower part of the softened water tank is provided with a second pipeline communicated with the softened water tank, the downstream end part of the second pipeline is communicated with the softened water circulating pipeline, and the downstream end part of the second pipeline is positioned between the first electric valve and the first water pump.
The water softening station is provided with a third pipeline connected with the water softening tank, the third pipeline is communicated with the first water tank, the lower part of the first water tank is provided with a first water drainage pipe, and the lower end part of the first water drainage pipe is provided with a first water distributor.
An overflow port is formed in one side of the first water tank, a first baffle is arranged at the overflow port, the first baffle is arranged in an inclined mode relative to the side wall of the first water tank, and a first overflow pipe is arranged at the overflow port.
The top and the bottom of the softened water tank are respectively provided with a second baffle and a third baffle, the second baffle and the third baffle are both positioned on one side of the first water tank, the second baffle is closer to the first water tank relative to the third baffle, the second baffle and the third baffle extend towards the inside of the softened water tank respectively, the height of the third baffle is higher than that of the upstream end of the softened water circulation pipeline, and the downstream end of the softened water circulation pipeline is positioned between the second baffle and the first water tank.
The sewage circulating device comprises a sewage tank and a sewage circulating pipeline which is positioned outside the sewage tank and is communicated with the sewage tank, wherein a second water pump is arranged on the sewage circulating pipeline in the flowing direction of sewage, the sewage circulating pipeline is communicated with a heat exchanger, the heat exchanger is positioned at the downstream of the second water pump, the downstream end part of the sewage circulating pipeline is communicated with the top of the sewage tank, a temperature sensor is arranged at the downstream of the heat exchanger on the sewage circulating pipeline, a fourth pipeline communicated with the sewage circulating pipeline is arranged at the downstream of the temperature sensor, a temperature control valve is arranged on the fourth pipeline, and the fourth pipeline discharges the sewage.
A second water tank is arranged on the inner top of the sewage tank, the downstream end part of the sewage circulating pipeline is communicated with the second water tank, a second sewer pipe is arranged at the lower part of the second water tank, and a second water distributor is arranged at the lower end part of the second sewer pipe;
an overflow port is formed in one side of the second water tank, a fourth baffle is arranged at the overflow port, the fourth baffle is arranged in an inclined mode relative to the side wall of the second water tank, and a second overflow pipe is arranged at the overflow port.
The lateral part of boiler is provided with the fifth pipeline of connecting the sewage case, the bottom of boiler is provided with the sixth pipeline of connecting the surge tank, the top of surge tank is provided with the seventh pipeline of connecting the sewage case, the lower side of surge tank is provided with the eighth pipeline of connecting the sewage case, fifth pipeline, seventh pipeline and eighth pipeline all are located one side of second basin, just the seventh pipeline for fifth pipeline and eighth pipeline are closer to the second basin, fifth pipeline, seventh pipeline and eighth pipeline respectively to the inside extension of sewage case, the lower tip of fifth pipeline, seventh pipeline and eighth pipeline is provided with the muffler respectively.
A fifth baffle is arranged at the bottom of the sewage tank, the fifth baffle extends towards the inside of the sewage tank, the fifth baffle is positioned between the seventh pipeline and the fifth pipeline, and the fifth baffle is positioned between the seventh pipeline and the eighth pipeline.
The invention has the following beneficial effects: the invention provides a boiler blow-off heat energy recycling system, which enables softened water and sewage generated by boiler blow-off to respectively circulate and uninterruptedly flow through a heat exchanger, fully utilizes the heat energy of the sewage, preheats the softened water, and the preheated softened water is used by a boiler, so that the temperature difference between the softened water and boiler water in the boiler can be reduced, the energy consumption is saved, the production cost is reduced, the service life of the boiler can be prolonged, the boiler faults are reduced, and the production is ensured. The buffer tank can reduce vibration and impact generated during the pollution discharge at the bottom of the boiler.
Softened water is stored in the softened water tank, and the softened water can flow out of the softened water tank through the softened water circulating pipeline, flow to the heat exchanger and then flow back to the softened water tank. When the deaerator water level is lower, the third motorised valve is opened, and demineralized water flows into the deaerator after preheating, supplies with the boiler again and uses. When the softened water tank is in fault, the fifth electric valve is opened, and softened water on the right side of the softened water tank flows into the second pipeline and then flows into the softened water circulating pipeline, and flows through the heat exchanger to absorb heat of sewage. Softened water generated by the softened water station flows into the softened water tank through the first water tank, the first lower water pipe and the first water distributor. The first overflow pipe is connected with the overflow port of the first water tank, when the softened water tank reaches an overflow level, the low-temperature softened water is firstly overflowed, and the first baffle prevents the softened water flowing into the first water tank from the soft water station from directly entering the first overflow pipe to be discharged. The second baffle and the third baffle enable softened water in the softened water tank to flow, so that low-temperature softened water firstly enters the softened water circulating pipeline and flows through the heat exchanger for heat exchange. The downstream end part of the softened water circulating pipeline is positioned between the second baffle and the first water tank, so that preheated softened water and low-temperature softened water can be mixed conveniently, and then the mixed softened water enters the softened water circulating pipeline, and heat energy is fully utilized.
The sewage is stored in the sewage tank, and the sewage circulating pipeline can enable the sewage to flow out of the sewage tank, flow to the heat exchanger and then flow back to the sewage tank. The temperature sensor detects the temperature of the sewage flowing through the heat exchanger, if the temperature of the sewage is lower than a set value, the temperature control valve is opened, the sewage with the temperature lower than the set value is discharged through the fourth pipeline, and if the temperature of the sewage is higher than the set value, the sewage continues to circularly flow in the sewage circulating pipeline. And the sewage passing through the heat exchanger flows into the sewage tank through the second water tank, the second sewer pipe and the second water distributor. The second overflow pipe is connected with an overflow port of the second water tank, when the sewage tank reaches an overflow level, the low-temperature sewage is firstly overflowed, and the fourth baffle prevents the sewage flowing into the second water tank from directly entering the second overflow pipe to be discharged. The lower end parts of the fifth pipeline, the seventh pipeline and the eighth pipeline are respectively provided with a silencer, the noise of sewage discharge can be reduced, the bottom of the sewage tank is provided with a fifth baffle, sewage in the sewage tank is divided into low-temperature sewage with heat exchange capacity on the left side of the fifth baffle and high-temperature sewage with the right side flowing into the sewage tank, the low-temperature sewage with heat exchange capacity on the left side of the fifth baffle can absorb heat of flash steam, the low-temperature sewage on the left side of the sewage tank can continuously enter the sewage circulating pipeline for heat exchange circulation after slowly passing through the right side of the sewage tank by the fifth baffle, the situation that the low-temperature sewage directly enters the heat exchanger and insufficient heat energy utilization is caused is avoided, a continuous circulating system is formed between the sewage tank and the heat exchanger, and the sewage temperature is continuously reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
In order to make the technical purpose, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention are further described below with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the present invention includes a boiler 61, a buffer tank 56, a deaerator 68, a water softening station 70, a softened water circulating device 101, a sewage circulating device 102, and a heat exchanger 28.
The deaerator 68 is connected with the boiler 61, the softened water circulating device 101 is connected with the soft water station 70, and the softened water generated by the soft water station 70 flows into the softened water circulating device 101, flows through the deaerator 68 and is conveyed to the boiler 61. The buffer tank 56 is communicated with the bottom of the boiler 61, and impurities and sewage discharged from the bottom of the boiler 61 are discharged into the buffer tank 56. The sewage circulating device 102 is respectively communicated with the boiler 61 and the buffer tank 56, and hot sewage discharged by the boiler surface blowdown and the boiler bottom blowdown respectively enters the sewage circulating device 102. The heat exchanger 28 is connected to a softened water circulation device 101 and a sewage circulation device 102, respectively, and the softened water and the sewage flow through the heat exchanger 28, respectively, and the softened water is heated by the sewage.
Specifically, the softened water circulation device 101 includes a softened water tank 13, a softened water circulation pipeline 27 communicated with the softened water tank 13 is arranged outside the softened water tank 13, a first water outlet 131 and a first water inlet 132 are arranged on the softened water tank 13, the softened water in the softened water tank 13 flows into the softened water circulation pipeline 27 from the first water outlet 131, and sequentially flows through a first electric valve 15, a first valve 16, a first water pump 17, a first check valve 18, a second valve 26 and a third valve 29 to flow into the heat exchanger 28, the softened water absorbs heat energy of sewage in the heat exchanger 28 and then flows out from the heat exchanger 28 after being heated, if the water level in the deaerator 68 is normal, the hot softened water in the heat exchanger 28 flows back into the softened water tank 13 through the first water inlet 132 after passing through a fourth valve 25 and a second electric valve 19, and the third electric valve 7 is in a closed state at this time.
The first water tank 20 is arranged on the inner top of the softened water tank 13, softened water generated by the softened water station 70 enters the first water tank 20 in the softened water tank 13 after passing through the fifth valve 1, the third pipeline 2 and the fourth electric valve 8, the softened water enters the first water tank 20 in the softened water tank 13, the first lower water pipe 21 is installed at the bottom of the first water tank 20, the first water distributor 14 is connected to the bottom of the first lower water pipe 21, the first water distributor 14 is composed of a plate 71, a support 72 and a plate 73, the plate 71 and the plate 73 are spaced at a proper distance, so that the softened water in the first water tank 20 can conveniently flow into the first water distributor 14 through the first lower water pipe 21 and then flows out from a gap between the plate 71 and the plate 73, the plate 71 and the plate 73 are welded together through the support 72, the support 72 can be made of short pipelines, too many supports are not suitable to be uniformly arranged, and the outflow. When the water level in the softened water tank 13 is lowered, the fourth electric valve 8 is opened, so that the softened water enters the first water tank 20 and enters the softened water tank 13 from the first water distributor 14.
A second baffle 22 and a third baffle 23 are installed in the softened water tank 13, the second baffle 22 is connected with the top of the softened water tank 13, the top of the second baffle 22 is provided with a hole to enable the top of the softened water tank 13 to be communicated with air, the third baffle 23 is connected with the bottom of the softened water tank 13, the second baffle 22 and the third baffle 23 are both located on one side of the first water tank 20, the second baffle 22 is closer to the first water tank 20 relative to the third baffle 23, and as shown in fig. 1, the second baffle 22 and the third baffle 23 are both located on the left side of the first water tank 20. The second baffle 22 and the third baffle 23 extend to a certain length towards the inside of the softened water tank 13, and the height of the third baffle 23 is higher than the height of the upstream end of the softened water circulation pipe 27, that is, the height of the third baffle 23 is higher than the height of the first water outlet 131, and the downstream end of the softened water circulation pipe 27 is located between the second baffle 22 and the first water tank 20, that is, the first water inlet 132 is located between the second baffle 22 and the first water tank 20.
The softened water at low temperature enters the middle part of the softened water tank 13 from the bottom of the second baffle 22 after entering the softened water tank 13 from the first water distributor 14, and then enters the left side of the softened water tank 13 from the top of the third baffle 23, so that the softened water at the left side of the softened water tank 13 enters the softened water circulation pipeline 27 and the heat exchanger 28 through the first water outlet 131, and can enter the right side of the second baffle 22 from the first water inlet 132 to flow back into the softened water tank 13. Softened water forms the flow owing to the effect of second baffle 22 and third baffle 23 in softened water tank 13 like this, and the hot water of avoiding backward flow flows into heat exchanger 28 with the direct mixture of the relatively microthermal water in softened water tank 13, causes the heat energy waste, but lets the water of the relatively low temperature in softened water tank 13 at every turn carry out the heat transfer through heat exchanger 28 with priority.
When the deaerator 68 is low in water level and water needs to be supplemented, the second electric valve 19 is automatically closed, the third electric valve 7 and the fourth electric valve 8 are automatically opened, the hot water with relatively high temperature stored at the left side of the softened water tank 13 flows into the softened water circulating pipeline 27, and enters the heat exchanger 28 through the first electric valve 15, the first valve 16, the first water pump 17, the first check valve 18, the second valve 26 and the third valve 29 in sequence, the softened water absorbs the heat energy of the sewage in the heat exchanger 28 to continue to be heated and then flows out from the heat exchanger 28, and enters a deaerator 68 through a fourth valve 25, a third electric valve 7 and a first pipeline 69, after the softened water is deaerated in the deaerator 68, the deaerated water in the deaerator 68 flows into a ninth pipeline 63, and flows into the boiler 61 through a sixth valve 67, a third water pump 66, a second check valve 65, a seventh valve 64 and an eighth valve 62 in sequence for utilization by the boiler. Meanwhile, the normal temperature softened water flows out of the soft water station 70, enters the first water tank 20 in the softened water tank 13 through the third pipeline 2 and the fourth electric valve 8, and then enters the softened water tank 13 through the first water distributor 14.
In any case, therefore, softened water flows between softened water tank 13 and heat exchanger 28, continuously preheating softened water by heat exchanger 28.
The softened water generated by the soft water station 70 flows into the first water tank 20, the first downcomer 21 and the first water distributor 14 in the softened water tank 13, so that the water in the first water tank 20 is the newly inflowing normal temperature softened water, the hot water in the softened water tank 13 is difficult to enter the first water tank 20, the first water tank 20 is provided with an overflow port, the first overflow pipe 10 is installed at the overflow port, the first overflow pipe 10 is communicated with the first water tank 20, and the water levels in the first water tank 20 and the softened water tank 13 are equal in height due to the principle of a communicating device. When the water level in the softened water tank 13 is too high, the normal temperature water in the first water tank 20 in the softened water tank 13 will overflow through the first overflow pipe 10 first, and the hot water in the softened water tank 13, which has passed through the heat exchanger 28 for heat exchange, will not overflow out of the softened water tank 13 through the first overflow pipe 10, so as to save heat energy and restore the water level in the softened water tank 13 to normal.
The first baffle 9 is installed at the overflow port of the first water tank 20, the first baffle 9 is obliquely arranged relative to the side wall of the first water tank 20, preferably, the included angle between the first baffle 9 and the side wall of the first water tank 20 is 45 degrees, and the first water baffle 9 can prevent the softened water in the first water tank 20 from entering the softened water station 70 through the fourth electric valve 8 when the water level of the softened water tank 13 is normal, namely, the water level is lower than the overflow water level, and the softened water directly enters the first overflow pipe 10 through the overflow port and is drained. In the present embodiment, the first baffle 9 is provided on the softened water tank 13, but the present invention is not limited thereto, and those skilled in the art can conceive of providing the first baffle 9 on the first overflow pipe 10.
The second pipe 12 communicated with the softened water tank 13 is arranged at the lower part of the softened water tank 13, the downstream end part of the second pipe 12 is communicated with the softened water circulating pipe 27, the downstream end part of the second pipe 12 is positioned between the first electric valve 15 and the first water pump 17, and the fifth electric valve 11 is arranged on the second pipe 12. When the softened water tank 13 is in failure, when the water level at the left side of the third baffle 23 in the softened water tank 13 is at the ultra-low water level, the fifth electric valve 11 is opened, and the softened water at the right side of the softened water tank 13 flows into the second pipeline 12 and then flows into the softened water circulating pipeline 27, and then flows into the heat exchanger 28 through the first valve 16, the first water pump 17, the first check valve 18, the second valve 26 and the third valve 29 in sequence to absorb the heat of the sewage.
The tenth pipeline 5 communicated with the third pipeline 2 is arranged on the third pipeline 2, the tenth pipeline 5 is communicated with the ninth pipeline 69, the seventeenth valve 3 and the eighth electric valve 4 are arranged on the tenth pipeline 5, the eighth electric valve 4 is closed under the normal condition, when the softened water circulating device 101 breaks down, the fourth electric valve 8 is closed, the eighth electric valve 4 is opened, the softened water generated by the soft water station 70 flows into the tenth pipeline 5 through the third pipeline 2 and then flows into the deaerator 68 through the ninth pipeline 69, and the deaerator 68 is prevented from being lack of water.
The sewage circulating device 102 includes a sewage tank 46, a sewage circulating pipeline 36 is disposed outside the sewage tank 46, the sewage circulating pipeline 36 is communicated with the sewage tank 46, a second water outlet 31 and a third water inlet 38 are disposed on the sewage tank 46, an upstream end and a downstream end of the sewage circulating pipeline 36 are respectively communicated with the second water outlet 31 and the third water inlet 38, sewage in the sewage tank 46 flows out from the second water outlet 31, flows into the sewage circulating pipeline 36, sequentially flows into the heat exchanger 28 through a ninth valve 42, a second water pump 41, a third check valve 40, a tenth valve 39 and an eleventh valve 37, and then flows back into the sewage tank 46 through the twelfth valve 30 and the thirteenth valve 52 after being heated by softened water in the heat exchanger 28.
A temperature sensor 32 is provided on the sewage circulation pipe 36 downstream of the heat exchanger 28, and the temperature sensor 32 is used to detect the temperature of the sewage flowing through the heat exchanger 28. A fourth pipe 35 communicating with the sewage circulation pipe 36 is provided downstream of the temperature sensor 32, and a temperature control valve 34 is provided on the fourth pipe 35. When the temperature sensor 32 detects that the temperature of the sewage flowing out of the heat exchanger 28 is lower than the set temperature, the temperature control valve 34 is automatically opened, and the low-temperature sewage flowing out of the heat exchanger 28 flows into the fourth pipeline 35 and is discharged through the fourteenth valve 33 and the temperature control valve 34 in sequence; if the temperature of the sewage flowing out of the heat exchanger 28 is higher than the set value, the temperature sensor 32 gives a signal, and the temperature control valve 34 automatically closes to stop the sewage discharge.
The bottom of the boiler 61 is provided with a sixth pipeline 57, the sixth pipeline 57 is provided with a sixth electric valve 58, the sixth pipeline 57 is communicated with the buffer tank 56, so that high-temperature sewage and impurities discharged by blowdown from the bottom of the boiler enter the buffer tank 56 through the sixth pipeline 57, the blowdown from the bottom of the boiler is instantaneous blowdown, the high-temperature sewage is subjected to flash evaporation in the buffer tank 56, the top of the buffer tank 56 is provided with a seventh pipeline 53, the seventh pipeline 53 is communicated with the sewage tank 46, steam subjected to flash evaporation in the buffer tank 56 enters the sewage tank 46 through the seventh pipeline 53 to release the pressure of the sewage, the bottom of the buffer tank 56 is provided with an eighth pipeline 55, the eighth pipeline 55 is communicated with the sewage tank 46, and the sewage in the buffer tank 56 enters the sewage tank 46 through the eighth pipeline 55. The side wall of the boiler 61 is provided with a fifth pipeline 54, the surface sewage of the boiler 61 is discharged according to the condition of the electric conductivity or alkalinity of the furnace water, and when the electric conductivity or alkalinity of the furnace water is not qualified, the sewage flows into the fifth pipeline 54 and is discharged into the sewage tank 46 from the bottom of the fifth pipeline 54 through a fifteenth valve 60 and a seventh electric valve 59.
The fifth pipe 54, the seventh pipe 53, and the eighth pipe 55 extend into the waste water tank 46, and preferably, the fifth pipe 54, the seventh pipe 53, and the eighth pipe 55 are provided at bottoms thereof with a first muffler 44, a second muffler 45, and a third muffler 43, respectively, so that waste water discharged from the boiler surface is discharged into the waste water tank 46 through the fifth pipe 54 and the first muffler 44, steam flashed in the buffer tank 56 is discharged into the waste water tank 46 through the seventh pipe 53 and the second muffler 45, and waste water discharged from the bottom of the buffer tank 56 is discharged into the waste water tank 46 through the eighth pipe 55 and the third muffler 43, and the first muffler 44, the second muffler 45, and the third muffler 43 can perform a muffling treatment on the discharged steam or waste water to reduce production noise. The sixteenth valve 77 is installed at the bottom of the buffer tank 56, and the impurities accumulated at the bottom of the buffer tank 56 can be discharged into the trench through the sixteenth valve 77 at the bottom.
The second water tank 51 is arranged on the inner top of the sewage tank 46, the second sewer pipe 48 is arranged at the bottom of the second water tank 51, the second water distributor 47 is connected to the bottom of the second sewer pipe 48, the second water distributor 14 is composed of a plate 74, a support 75 and a plate 76, the distance between the plate 74 and the plate 76 is proper, sewage in the second water tank 51 can conveniently flow into the second water distributor 47 through the second sewer pipe 48 and then flow out from a gap between the plate 74 and the plate 76, the plate 74 and the plate 76 are welded together through the support 75, the support 75 can be made of short pipelines, the support is not too much, and the support should be uniformly arranged so as not to influence the outflow of the sewage from the gap.
When the sewage flows back into the sewage tank 46 through the twelfth valve 30 and the thirteenth valve 52 after being absorbed with heat by the softened water in the heat exchanger 28, the sewage first enters the second water tank 51 in the sewage tank 46 through the third water inlet 38, then enters the second water distributor 47 through the second sewer pipe 48, and flows into the sewage tank through the gap between the plate 74 and the plate 76 of the second water distributor 47, the fifth pipeline 54, the seventh pipeline 53 and the eighth pipeline 55 are all positioned at one side of the second water tank 51, as shown in the figure, the fifth pipeline 54, the seventh pipeline 53 and the eighth pipeline 55 are all positioned at the right side of the second water tank 51, the seventh pipeline 53 is positioned closer to the second water tank 51 than the fifth pipeline 54 and the eighth pipeline 55, a fifth baffle 78 is installed at the bottom of the sewage tank 46, the fifth baffle 78 is positioned between the seventh pipeline 53 and the fifth pipeline 54, and the fifth baffle 78 is positioned between the seventh pipeline 53 and the eighth pipeline 55, the fifth baffle 78 extends toward the inside of the wastewater tank 46, but the height of the fifth baffle 78 should not be too high, and the fifth baffle 78 divides the wastewater in the wastewater tank 46 into low-temperature wastewater exchanged with thermal energy on the left side of the fifth baffle 78 and high-temperature wastewater that has just flowed into the wastewater tank 46 on the right side.
The water outlet of the steam flashed in the buffer tank 56 and the water outlet of the boiler sewage are respectively arranged at the left side and the right side of the fifth baffle 78, namely the second muffler 45 is arranged at the left side of the fifth baffle 78, which is beneficial for the low-temperature sewage at the left side of the fifth baffle 78 exchanging the heat energy to absorb the heat of the flashed steam, the first muffler 44 and the third muffler 43 are arranged at the right side of the fifth baffle 78, the low-temperature sewage at the left side of the sewage tank 46 slowly passes through the fifth baffle 78 and enters the right side of the sewage tank 46, and then the heat exchange circulation is continued, so that the situation that the low-temperature sewage directly enters the heat exchanger 28 is avoided, the heat energy utilization is insufficient, and the heat exchange is continuously carried out as long as the boiler pollution discharge. This provides a continuous circulation between the waste tank 46 and the heat exchanger 28, which continuously reduces the temperature of the waste water.
The second water tank 51 has an overflow port, a second overflow pipe 49 is installed at the overflow port, the second overflow pipe 49 communicates with the second water tank 51, and the water level in the second water tank 51 and the contaminated water tank 46 is equal due to the principle of the communicating vessel. When the water level of the sewage tank 46 is ultrahigh and reaches the overflow water level, the low-temperature sewage in the second water tank 51 firstly overflows out of the sewage tank 46, and the sewage with higher temperature in the sewage tank 46 does not overflow through the second overflow pipe 49, so that the heat energy is saved and the waste of the heat energy is avoided. A fourth baffle 50 is also installed at the overflow port, the fourth baffle 50 is inclined relative to the side wall of the second water tank 51, and preferably, the included angle between the fourth baffle 50 and the side wall of the second water tank 51 is 45 degrees, so that the sewage at the return port is prevented from entering the second overflow pipe 49 through the overflow port after being splashed normally.
The invention provides a boiler blow-off heat energy recycling system, which enables softened water and sewage generated by boiler blow-off to respectively circulate and uninterruptedly flow through a heat exchanger, fully utilizes the heat energy of the sewage, preheats the softened water, and the preheated softened water is used by a boiler, so that the temperature difference between the softened water and boiler water in the boiler can be reduced, the energy consumption is saved, the production cost is reduced, the service life of the boiler can be prolonged, the boiler faults are reduced, and the production is ensured.
Finally, it should be noted that: the above embodiments are merely illustrative and not restrictive of the technical solutions of the present invention, and any equivalent substitutions and modifications or partial substitutions made without departing from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.
Claims (4)
1. The utility model provides a boiler blowdown heat energy cyclic utilization system, includes soft water station, the boiler, with the oxygen-eliminating device that the boiler is linked together, its characterized in that still includes:
the softened water circulating device is communicated with the soft water station, and the softened water generated by the soft water station flows into the softened water circulating device, then flows through the deaerator and is conveyed to the boiler;
the buffer tank is communicated with the bottom of the boiler;
the sewage circulating device is respectively communicated with the boiler and the buffer tank;
the heat exchanger is respectively connected with the softened water circulating device and the sewage circulating device, the softened water and the sewage respectively flow through the heat exchanger, and the sewage transfers heat to the softened water;
the softened water circulating device comprises a softened water tank and a softened water circulating pipeline which is positioned outside the softened water tank and communicated with the softened water tank, wherein a first electric valve, a first water pump and a second electric valve are sequentially arranged on the softened water circulating pipeline in the flowing direction of softened water, the softened water circulating pipeline is communicated with the heat exchanger, the heat exchanger is positioned between the first water pump and the second electric valve, and the downstream end part of the softened water circulating pipeline is communicated with the top of the softened water tank;
a first pipeline communicated with the deaerator is arranged on the softened water circulating pipeline at the upstream of the second electric valve, and a third electric valve is arranged on the first pipeline;
a second pipeline communicated with the softened water tank is arranged at the lower part of the softened water tank, the downstream end part of the second pipeline is communicated with the softened water circulating pipeline, and the downstream end part of the second pipeline is positioned between the first electric valve and the first water pump;
a first water tank is arranged on the inner top of the softened water tank, a third pipeline connected with the softened water tank is arranged at the softened water station, the third pipeline is communicated with the first water tank, a first lower water pipe is arranged at the lower part of the first water tank, and a first water distributor is arranged at the lower end part of the first lower water pipe;
the sewage circulating device comprises a sewage tank and a sewage circulating pipeline which is positioned outside the sewage tank and communicated with the sewage tank, a second water pump is arranged on the sewage circulating pipeline in the flowing direction of sewage, the sewage circulating pipeline is communicated with the heat exchanger, the heat exchanger is positioned at the downstream of the second water pump, the downstream end part of the sewage circulating pipeline is communicated with the top of the sewage tank, a temperature sensor is arranged at the downstream of the heat exchanger and on the sewage circulating pipeline, a fourth pipeline communicated with the sewage circulating pipeline is arranged at the downstream of the temperature sensor, a temperature control valve is arranged on the fourth pipeline, and the fourth pipeline discharges the sewage;
a second water tank is arranged on the inner top of the sewage tank, the downstream end part of the sewage circulating pipeline is communicated with the second water tank, a second sewer pipe is arranged at the lower part of the second water tank, and a second water distributor is arranged at the lower end part of the second sewer pipe;
an overflow port is formed in one side of the second water tank, a fourth baffle is arranged at the overflow port, the fourth baffle is arranged in an inclined mode relative to the side wall of the second water tank, and a second overflow pipe is mounted at the overflow port;
the lateral part of boiler is provided with the fifth pipeline of connecting the sewage case, the bottom of boiler is provided with the sixth pipeline of connecting the surge tank, the top of surge tank is provided with the seventh pipeline of connecting the sewage case, the lower side of surge tank is provided with the eighth pipeline of connecting the sewage case, fifth pipeline, seventh pipeline and eighth pipeline all are located one side of second basin, just the seventh pipeline for fifth pipeline and eighth pipeline are closer to the second basin, fifth pipeline, seventh pipeline and eighth pipeline respectively to the inside extension of sewage case, the lower tip of fifth pipeline, seventh pipeline and eighth pipeline is provided with the muffler respectively.
2. The boiler blow-down heat energy recycling system according to claim 1, wherein an overflow port is provided at one side of the first water tank, a first baffle is provided at the overflow port, the first baffle is disposed obliquely with respect to a side wall of the first water tank, and a first overflow pipe is installed at the overflow port.
3. The boiler blow-down heat energy recycling system according to claim 2, wherein a second baffle and a third baffle are respectively disposed at the top and the bottom of the softened water tank, the second baffle and the third baffle are both located at one side of the first water tank, the second baffle is closer to the first water tank than the third baffle, the second baffle and the third baffle respectively extend to the inside of the softened water tank, the height of the third baffle is higher than that of the upstream end of the softened water circulation pipe, and the downstream end of the softened water circulation pipe is located between the second baffle and the first water tank.
4. The boiler blow-down heat energy recycling system according to claim 1, wherein a fifth baffle is provided on the bottom of the waste water tank, the fifth baffle extends towards the inside of the waste water tank, the fifth baffle is located between the seventh pipe and the fifth pipe, and the fifth baffle is located between the seventh pipe and the eighth pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710992666.3A CN107973356B (en) | 2017-10-23 | 2017-10-23 | Boiler blowdown heat energy cyclic utilization system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710992666.3A CN107973356B (en) | 2017-10-23 | 2017-10-23 | Boiler blowdown heat energy cyclic utilization system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107973356A CN107973356A (en) | 2018-05-01 |
| CN107973356B true CN107973356B (en) | 2021-04-20 |
Family
ID=62012570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710992666.3A Active CN107973356B (en) | 2017-10-23 | 2017-10-23 | Boiler blowdown heat energy cyclic utilization system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107973356B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111664439A (en) * | 2019-03-07 | 2020-09-15 | 中石化广州工程有限公司 | Periodical pollution discharge flash tank |
| CN113932207A (en) * | 2021-10-20 | 2022-01-14 | 河南中烟工业有限责任公司 | Boiler with double furnace containers |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6863822B2 (en) * | 2002-10-16 | 2005-03-08 | Anthony Pipes | Method and apparatus for parallel desalting |
| CN203083396U (en) * | 2013-01-28 | 2013-07-24 | 陈秀虎 | Hot waste water energy recycling system |
| CN104033880B (en) * | 2014-06-30 | 2016-01-20 | 河南中烟工业有限责任公司 | Boiler blowdown water heat energy utilization system |
| CN204372900U (en) * | 2014-12-23 | 2015-06-03 | 双钱集团股份有限公司 | Boiler blow-off waste-heat recovery device |
-
2017
- 2017-10-23 CN CN201710992666.3A patent/CN107973356B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN107973356A (en) | 2018-05-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202118887U (en) | Energy-saving water feeding system for boiler | |
| CN107973356B (en) | Boiler blowdown heat energy cyclic utilization system | |
| CN102519032B (en) | Sewage drainage energy-saving flash tank | |
| CN202955680U (en) | Heat utilization device of boiler blow-down water | |
| CN104033880B (en) | Boiler blowdown water heat energy utilization system | |
| CN103982886A (en) | Partial jet flow small circulating ratio pipe casing type high temperature waste heat steam boiler | |
| CN201196491Y (en) | Boiler exhaust heat recovery and utilization apparatus | |
| CN210241541U (en) | Boiler blow-off water treatment device | |
| CN210568353U (en) | High-efficient oxygen-eliminating device | |
| CN205503389U (en) | Colliery pressure fan, pit water energy recovery utilize system | |
| CN210267189U (en) | Waste heat utilization system for heating cooling water backwater of slag cooler by using boiler blow-down water | |
| CN212537802U (en) | Waste heat and waste water recovery device | |
| CN111780088B (en) | Steam utilization system | |
| CN209621560U (en) | A kind of residual heat of air compressor recycling supplying hot water circulating water saving system | |
| CN207334768U (en) | Residual heat from boiler fume multistage recycling system | |
| CN201396954Y (en) | Modularized pressure-loaded solar energy collection device | |
| CN205939708U (en) | Gas heater's hydrologic cycle structure | |
| KR101092496B1 (en) | Apparatus for draining solar energy collcector to prevent overheating | |
| CN206739262U (en) | Boiler blow-off waste heat recovery device | |
| CN205065683U (en) | Auxiliary boiler sewer heat recovery system | |
| CN204005931U (en) | Boiler blowdown water heat energy utilization system | |
| CN220338434U (en) | Boiler fixed exhaust steam waste heat recovery system | |
| CN204301034U (en) | A kind of Steam Generators in NPP blowdown heat recovery system | |
| CN218820286U (en) | Boiler thermal efficiency lifting device for heating heat conduction oil | |
| CN203880674U (en) | Shell-and-tube high-temperature waste heat steam boiler with small circulation ratio |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |